Re: spark length formula needed*

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mystuffs-at-orwell-dot-net>

John,
Maybe what you are calling a "hanging tale" might be more of an accuracy
then you think? Even trannys of the same wattage would, or maybe, have a
wattage\time relation?
so for a bank of nst's compared to the pole pigs, the pig will just
charge faster?
Just idle thinking, but??????
Also, any config i throw in for my pt's, i always use the pole pig. so
this most likely accounts for the accuracy's. Maybe nst bank users
"should be" using the pig option for a closer spark length output?

Marc

Tesla list wrote:
> 
> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
> 
> Marc -
> 
> Thank you for your interest in the JHCTES program. Although this program has
> taken several years to develop based on real world coils the program still
> requires improvement. One example is the spark length parameter. The program
> shows that the spark length increases as the power source voltage (NST
> secondary) increases. This voltage is also dependent on the voltage
> regulation of the source, and thereby hangs a tale.
> 
> The voltage regulation differs for NST, pole transformers, bombarders, etc.
> Because of this variation the spark length for a NST at a certain apparent
> wattage will be less than for a pole transformer, etc, of the same wattage.
> The JHCTES program does not take voltage regulation into consideration and I
> have never heard of any spark length equation that does. Some day when
> enough test info becomes available, this voltage regulation parameter can be
> added to equations and computer programs.
> 
> Voltage regulation for a certain power source can change with the type of
> load applied. This may be the reason that some coilers have found a jump in
> streamer behavior when the power changes because Tesla coil operation is a
> varying load type of operation.
> 
> John Couture
> 
> --------------------------
> 
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Thursday, December 20, 2001 4:49 PM
> To: tesla-at-pupman-dot-com
> Subject: Re: spark length formula needed*
> 
> Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <mystuffs-at-orwell-dot-net>
> 
> I am a firm believer in John C's calculator! As some know, I've built
> some very "unorthodox" tc configs and running even the strangest, being
> the 3k coil, John C's calculator has always given me a good and reliable
> spark length to expect!
> My hat's off to Mr. Courture, I've slapped some very "unique" coils
> through his program and by gum, it's been within a few inches with good
> tuning.
> Good work John!
> Take care,
> Marc M.
> 
> Tesla list wrote:
> >
> > Original poster: "John H. Couture by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
> >
> > J. Whyte -
> >
> > The TC spark length from the secondary terminal is dependent on many
> > variables. The most important are input watts, Tesla primary voltage, and
> > secondary coil inductance. The JHCTES Ver 3.3 TC computer program uses
> these
> > three variables to determine the output spark length shown by the
> computer.
> > You may want to compare the Ver 3.3 spark length with formulas that you
> > find. However, keep in mind that TC spark length is a somewhat random
> output
> > for comparing Tesla coils.
> >
> > The Ver 3.3 program is an on-line program and is at the following web site
> >
> >      www.mgte-dot-com
> >
> > Click on Tesla and then JHCTES
> >
> > John Couture
> >
> > --------------------------------
> >
> > -----Original Message-----
> > From: Tesla list [mailto:tesla-at-pupman-dot-com]
> > Sent: Wednesday, December 19, 2001 4:07 PM
> > To: tesla-at-pupman-dot-com
> > Subject: spark length formula needed*
> >
> > Original poster: "J Whyte by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <xoom321-at-hotmail-dot-com>
> >
> > Is their a way of determining spark length via mathmatical formula.
> >
> > I am suspicious of the TC calculator: I keep getting 226" (18.83 ft) for
> > spark length for a quadruple MOT power supply with a 115 nF as my tank
> cap.
> >
> > _________________________________________________________________
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